Consider the following statements regarding electromagnetic flowmeter 1. AC excitation is used to avoid polarisation of fluid.2. The meter calibration is changed as viscosity of fluid changes.3. Stainless steel pipes can be used for measuring the flow of liquid of high conductivity. Of the above statements

• A. 1, 2, 3 are correct
• B. 1 and 2 are correct
• C. 2 and 3 are correct
• D. 1 and 3 are correct